Organic electroluminescent element

摘要

Provided is a high-luminance, long-life laminated organic electroluminescent element. The organic electroluminescent element has a composition in which a plurality of light-emitting units, including at least one organic light-emitting layer, are laminated between a positive electrode and a negative electrode, and in which a linking layer is held between the respective light-emitting units. The linking layer is formed by laminating, in succession from the positive electrode side, an electron generating/transport section, an intermediate layer, and a hole generating/transport section, which contain at least one metal selected from a group consisting of an alkali metal, alkaline earth metal, rare earth metal, alloy of these metals, and compound of these metals. Preferably the intermediate layer contains an electrical insulating non-semiconductive substance having a specific resistance which is between 1.0×102 Ω·cm and 1.0×109 Ω·cm.

主权项

1. An organic electroluminescent element, comprising
an anode, a cathode, plural light-emitting units that are stacked between the anode and the cathode, each light-emitting unit comprising at least one organic light-emitting layer, and a connection layer sandwiched between the respective light-emitting units,
wherein in the connection layer, the following are successively stacked from an anode side:
an electron-generating and transporting section which is a mixed layer of:
at least one selected from the group consisting of alkali metals, alkaline earth metals, rare earth metals, and alloys of these metals, and compounds of these metals excluding metal oxide compounds; andan organic compound which is an electron-transporting material;a single layer consisting of only an electron-transporting material which is a charge-transporting organic material; anda hole-generating and transporting section.